package com.htzos.common.util;

public class FirstLetterUtil { 
	

	    //字母Z使用了两个标签，这里有２７个值
	    //i, u, v都不做声母, 跟随前面的字母
	    private char[] chartable =
	            {
	                '啊', '芭', '擦', '搭', '蛾', '发', '噶', '哈', '哈',
	                '击', '喀', '垃', '妈', '拿', '哦', '啪', '期', '然',
	                '撒', '塌', '塌', '塌', '挖', '昔', '压', '匝', '座'
	            };

	    private char[] alphatable =
	            {
	                'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
	                'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 
	                'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
	            };


	    private int[] table = new int[27];
	    //初始化
	    {
	        for (int i = 0; i < 27; ++i) {
	            table[i] = gbValue(chartable[i]);
	        }
	    }

	    public FirstLetterUtil() {
	    }

	    //主函数,输入字符,得到他的声母,
	    //英文字母返回对应的大写字母
	    //其他非简体汉字返回 '0'

	    public char Char2Alpha(char ch) {

	        if (ch >= 'a' && ch <= 'z')
	            return (char) (ch - 'a' + 'A');
	        if (ch >= 'A' && ch <= 'Z')
	            return ch;
	        int gb = gbValue(ch);
	        if (gb < table[0])
	            return '0';
	        int i;
	        for (i = 0; i < 26; ++i) {
	            if (match(i, gb)) break;
	        }
	        if (i >= 26)
	            return '0';
	        else
	            return alphatable[i];
	    }

	    //根据一个包含汉字的字符串返回一个汉字拼音首字母的字符串
	    public String String2Alpha(String SourceStr){
	        
	        String Result = "";
	        int StrLength = SourceStr.length();
	        int i;
	        try {
	            for (i = 0; i < StrLength; i++) {
	                Result += Char2Alpha(SourceStr.charAt(i));
	            }
	        } catch (Exception e) {
	            Result = "";
	        }
	        return Result;
	    }

	    private boolean match(int i, int gb) {
	        
	        if (gb < table[i])
	            return false;
	        int j = i + 1;

	        //字母Z使用了两个标签
	        while (j < 26 && (table[j] == table[i])) ++j;
	        if (j == 26)
	            return gb <= table[j];
	        else
	            return gb < table[j];
	    }

	    //取出汉字的编码
	    private int gbValue(char ch) {
	        
	        String str = new String();
	        str += ch;
	        try {
	            byte[] bytes = str.getBytes("GB2312");
	            if (bytes.length < 2)
	                return 0;
	            return (bytes[0] << 8 & 0xff00) + (bytes[1] &
	                    0xff);
	        } catch (Exception e) {
	            return 0;
	        }
	    }

	    public static void main(String[] args) {
	        
	    	FirstLetterUtil obj1 = new FirstLetterUtil();
	        System.out.println(obj1.String2Alpha("我爱你大傻逼"));
	        System.out.println(obj1.String2Alpha("吴广"));
	        return;
	    }

}